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Home
Pontiac
Firebird
Engine
Symptoms
Runs Rough
Running rough
1992 PONTIAC FIREBIRD
130,000 MILES • 3.1L • 6 CYL • 2WD • MANUAL
TONI PERRY
MEMBER
1 POST
FOLLOW
It is running really rough like it's misfiring.
Jan 22, 2020 at 2:02 PM
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KASEKENNY
CERTIFIED EXPERT
18,907 POSTS
Is the check engine light on or flashing? If there are no codes then we need to check for vacuum leaks.
Does it only run rough when idling or at other times? Have you performed any repairs to this point?
https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge
https://www.2carpros.com/articles/engine-misfires-or-runs-rough
Jan 22, 2020 at 6:27 PM